class A {
int m;
int getM() {
return m;
}
int seeM(){
return m;
}
}
class B extends A {
int m;
int getM() {
return m+100;
}
}
public class E3{
public static void main (String args[]) {
B b =new B();
b.m=20;
System.out.println(b.getM());
A a=b;
a.m=-100;
System.out.println(a.getM());
System.out.println(b.seeM());
}
}
